Red meat consumption and mortality — results from 2 prospective cohort studies
In plain English
Pooling the Nurses' Health Study and Health Professionals Follow-Up Study (121,000 adults, up to 28 years), each extra daily serving of unprocessed red meat raised total mortality 13%, and each serving of processed red meat raised it 20%. Crucially, the authors modelled substitutions: swapping one serving of red meat for fish, poultry, nuts or legumes was associated with 7-19% lower mortality. It remains one of the most-cited data points behind 'eat less red meat' guidance.
Why it matters
Each daily serving of red meat raised mortality 13% (20% if processed); swapping it for plant protein lowered risk.
Informs: Cancer·Heart Disease·Life Expectancy
Provenance
- Design
- Prospective cohort
- Sample size (n)
- 121,342
- Follow-up
- 28 years
- Peer-reviewed
- Yes
- Replications
- 4
- Funding
- Public / academic
- Funders
- US National Institutes of Health
- Institutions
- Harvard T.H. Chan School of Public Health, Brigham and Women's Hospital
decades.plus score
A transparent 0–100 weighted sum across six components. Higher scores reflect bigger, cleaner, more replicated work.
Caveats
Observational cohorts of mostly white US health professionals; diet was self-reported by questionnaire. Later analyses (e.g. the 2019 NutriRECS review) argued the absolute risk per person is small and the evidence certainty low — the relative signal is robust, the individual-level magnitude is debated.
